I have a link to the mailing list discussion:
https://lists.apache.org/thread.html/b857afc7b52e72b2e60ebb3eb594b6fa5dd0ed3c9af5a17b58ee4a99%40%3Cdev.trafficcontrol.apache.org%3E

People can still use APIv3 (and v2) until ATCv7. if we don't deprecate
APIv3, then we're going to be in the same boat next time around when APIv5
happens - which I know some people aren't thrilled about but I think we're
going to need it almost immediately after ATCv6 drops - where we have two
supported legacy API versions carrying around cruft and tech debt. IMO, we
need to rip this band-aid off sooner rather than later, so that APIv3
doesn't become the next entrenched version to be hard-coded into a plethora
of obscure scripts so that it takes over a year to switch.



On Tue, Jul 27, 2021 at 4:05 PM Dave Neuman <neu...@apache.org> wrote:

> Isn't this email almost like a survey?  Anyone doing API work is probably
> on this ML or should be.
>
> Brennan, do you have a link to that discussion?  If it wasn't on list then
> it didn't happen ;)
>
> Like I said, I am not going to -1 the proposal but given that I now know
> that 4.x isn't introduced until ATC 6.x, I don't see the big hurry to
> remove 2.x and 3.x.  It seems a little premature to me, maybe we just do
> 2.x and not 3.x?  Presumably folks that updated from 1.x went to 3.x and we
> should give them a chance to use that before ripping it out too.
>
> Also, as an aside, it seems like we are adding more and more to 6.x, if we
> want to get that out we should probably just focus on what needs to be
> completed and not adding more to it.
>
> --Dave
>
>
> On Tue, Jul 27, 2021 at 2:24 PM ocket 8888 <ocket8...@gmail.com> wrote:
>
> > The reason that's relevant being that deprecating 2.0 and 3.0 with the
> > release of 4.0 is in-line with that strategy.
> >
> > On Tue, Jul 27, 2021 at 2:23 PM ocket 8888 <ocket8...@gmail.com> wrote:
> >
> > > I know it doesn't change the reality of our situation, but fwiw APIv1
> > > should've already been gone. From our discussion regarding versioning
> > when
> > > we were making APIv2 prior to ATC release 4.0:
> > >
> > > > TC 4.0:
> > > > - API 1.x supported, some deprecation notices
> > > >
> > > > TC 4.1:
> > > > - API 1.x still supported, deprecation notices added to endpoints not
> > > graduated to 2.0
> > > > - API 2.0 supported, consisting of 1.x endpoints that were graduated
> > > > - starting with this release, you need to start migrating external
> > > clients off of 1.x over to 2.0
> > > >
> > > > TC 4.2:
> > > > - internal clients (e.g. TM, TR, etc) will be migrated off API 1.x
> over
> > > to 2.0. Doing this step after 4.1 adds confidence that 1.x is still
> > > supported alongside 2.0 in order to provide a smooth migration period
> for
> > > API clients.
> > > >
> > > > TC 5.0:
> > > > - API 1.x no longer supported, only API 2.x is supported
> > >
> > > The only reason APIv1 exists in 5.x is because "starting with this
> > > release, you need to start migrating external clients off of 1.x over
> to
> > > 2.0" wound up taking much, much longer than we thought it would. The
> > plan,
> > > as I understand it, was always for only three API versions to ever
> > coexist
> > > - and only two released versions:
> > > - legacy version, deprecated, what everyone's using prior to upgrade to
> > > ATC version that deprecates it
> > > - supported version, latest released
> > > - development version, not released, nobody should use except ATC
> > > components under active development.
> > >
> > > On Tue, Jul 27, 2021 at 11:56 AM Rawlin Peters <raw...@apache.org>
> > wrote:
> > >
> > >> I guess the question now is what do we think is "fair" for our users?
> > >> Shouldn't they decide? Can we survey them? If it were me doing the
> > >> updates, I think I'd prefer to do the 2nd update as close to the 1st
> > >> update as possible, since those necessary changes would still be fresh
> > >> in memory. Especially knowing that a 2nd update is coming at some
> > >> point, I'd rather just get it over with as soon as possible and not
> > >> have to worry about planning for it later down the line.
> > >>
> > >> - Rawlin
> > >>
> > >> On Tue, Jul 27, 2021 at 11:36 AM Zach Hoffman <zrhoff...@apache.org>
> > >> wrote:
> > >> >
> > >> > > > Does API 4.x exist before 6.0?
> > >> > > According to the most recent docs, yes.
> > >> >
> > >>
> >
> https://traffic-control-cdn.readthedocs.io/en/latest/api/index.html#api-v4-routes
> > >> >
> > >> > Those are the docs for the master branch.
> > >> > There is no mention of API 4.x in the ATC 5.1.2 docs:
> > >> > https://traffic-control-cdn.readthedocs.io/en/v5.1.2/api/index.html
> > >> >
> > >> > -Zach
> > >> >
> > >> >
> > >> > On Tue, Jul 27, 2021 at 11:29 AM Gray, Jonathan
> > >> > <jonathan_g...@comcast.com.invalid> wrote:
> > >> >
> > >> > > According to the most recent docs, yes.
> > >> > >
> > >>
> >
> https://traffic-control-cdn.readthedocs.io/en/latest/api/index.html#api-v4-routes
> > >> > >
> > >> > > Jonathan G
> > >> > >
> > >> > > From: Dave Neuman <neu...@apache.org>
> > >> > > Date: Tuesday, July 27, 2021 at 10:59 AM
> > >> > > To: dev@trafficcontrol.apache.org <dev@trafficcontrol.apache.org>
> > >> > > Subject: Re: [EXTERNAL] Re: Deprecate APIv2 and v3
> > >> > > Does API 4.x exist before 6.0?
> > >> > > I am worried about basically telling our users that before they
> can
> > >> go to
> > >> > > 6.x they have to get off API 1.x but the latest at that point is
> 3.x
> > >> so
> > >> > > then we are turning around and saying they have to update again.
> I
> > >> would
> > >> > > prefer if we gave more time and did 2.0 now and 3.0 in our next
> > >> release.
> > >> > > I am not going to -1 because ultimately it is not going to impact
> me
> > >> as
> > >> > > much as those that have already shared opinions, but I did want to
> > >> make
> > >> > > sure we aren't being unfair to our users.
> > >> > >
> > >> > > Thanks,
> > >> > > Dave
> > >> > >
> > >> > > On Mon, Jul 26, 2021 at 4:40 PM Zach Hoffman <
> zrhoff...@apache.org>
> > >> wrote:
> > >> > >
> > >> > > > +1 for deprecating APIv2 and APIv3.
> > >> > > >
> > >> > > > -Zach
> > >> > > >
> > >> > > > On Tue, Jul 20, 2021 at 3:28 PM Jeremy Mitchell <
> > >> mitchell...@gmail.com>
> > >> > > > wrote:
> > >> > > >
> > >> > > > > sorry about that. i'm +1 on deprecating APIv2 and APIv3 in the
> > >> fashion
> > >> > > > you
> > >> > > > > mentioned.
> > >> > > > >
> > >> > > > > On Tue, Jul 20, 2021 at 2:39 PM ocket 8888 <
> ocket8...@gmail.com
> > >
> > >> > > wrote:
> > >> > > > >
> > >> > > > > > I don't really want to propose anything more complex than
> > >> deprecating
> > >> > > > > APIv2
> > >> > > > > > and APIv3 in this  thread. Which isn't to say that I don't
> > have
> > >> > > > opinions
> > >> > > > > on
> > >> > > > > > all of this, but it's starting to confuse the point when
> > people
> > >> are
> > >> > > > > giving
> > >> > > > > > +1s and -1s on things besides the thread subject.
> > >> > > > > >
> > >> > > > > > On Tue, Jul 20, 2021 at 2:17 PM Robert O Butts <
> > r...@apache.org>
> > >> > > wrote:
> > >> > > > > >
> > >> > > > > > > > so really TO (api) seems to have many versions
> > >> > > > > > >
> > >> > > > > > > The Traffic Ops application has a single project/app
> > version.
> > >> The
> > >> > > TO
> > >> > > > > > > Application "serves" multiple API Versions, which are
> > >> unrelated to
> > >> > > > that
> > >> > > > > > > application version. TO doesn't "have" many versions, it
> has
> > >> one
> > >> > > > > > version. A
> > >> > > > > > > particular Traffic Ops version "10" might serve API
> versions
> > >> X,Y,Z.
> > >> > > > But
> > >> > > > > > > those API versions aren't "part" of the Traffic Ops
> > Versions.
> > >> There
> > >> > > > > > exists
> > >> > > > > > > no "Traffic Ops version 10" which serves any other API
> > >> versions.
> > >> > > And
> > >> > > > > > there
> > >> > > > > > > might exist other Traffic Ops versions which also serve
> > >> X,Y,Z. So,
> > >> > > TO
> > >> > > > > > only
> > >> > > > > > > has one version, "10." X,Y,Z are unrelated to 10, except
> > that
> > >> 10 is
> > >> > > > > > > documented as serving X,Y,Z.
> > >> > > > > > >
> > >> > > > > > > > ATC is version 5.x, for example, so all the components
> are
> > >> > > version
> > >> > > > > 5.x,
> > >> > > > > > > right?
> > >> > > > > > >
> > >> > > > > > > As an aside, IMO having separate application versions
> would
> > >> make a
> > >> > > > lot
> > >> > > > > of
> > >> > > > > > > sense and make a lot of things easier. I don't want to
> push
> > >> for
> > >> > > that
> > >> > > > > > right
> > >> > > > > > > now, but something to think about. Maybe part of the
> version
> > >> after
> > >> > > > the
> > >> > > > > > > project, e.g. ATC could be Version 10.11 and Traffic Ops
> > >> could have
> > >> > > > its
> > >> > > > > > own
> > >> > > > > > > application version 5.7, so Traffic Ops would have the
> > >> complete
> > >> > > > version
> > >> > > > > > > "atc-10.11-to-5.7-hash-abc123.rpm" or whatever. I think
> that
> > >> might
> > >> > > > make
> > >> > > > > > it
> > >> > > > > > > clearer when one app hasn't changed even if the project
> did,
> > >> > > > especially
> > >> > > > > > > with our apps that don't change very often. Something to
> > think
> > >> > > about.
> > >> > > > > > >
> > >> > > > > > >
> > >> > > > > > >
> > >> > > > > > > On Tue, Jul 20, 2021 at 1:44 PM Jeremy Mitchell <
> > >> > > > mitchell...@gmail.com
> > >> > > > > >
> > >> > > > > > > wrote:
> > >> > > > > > >
> > >> > > > > > > > All good points but also consider this, ATC is version
> > 5.x,
> > >> for
> > >> > > > > > example,
> > >> > > > > > > so
> > >> > > > > > > > all the components are version 5.x, right? meaning the
> TO
> > >> > > component
> > >> > > > > > (aka
> > >> > > > > > > > the TO api) is.... version 5.x.... :)
> > >> > > > > > > >
> > >> > > > > > > > so really TO (api) seems to have many versions (5.x
> > >> inherited
> > >> > > from
> > >> > > > > the
> > >> > > > > > > > project and 2.x, 3.x, 4.x, the versions of the
> > >> "interface"). yes,
> > >> > > > > > > > confusing...
> > >> > > > > > > >
> > >> > > > > > > >
> > >> > > > > > > >
> > >> > > > > > > > On Tue, Jul 20, 2021 at 1:32 PM Robert O Butts <
> > >> r...@apache.org>
> > >> > > > > wrote:
> > >> > > > > > > >
> > >> > > > > > > > > > Also, after years of API confusion, is it time to
> > >> simply sync
> > >> > > > the
> > >> > > > > > ATC
> > >> > > > > > > > > > version with the API version (brennan has touched on
> > >> this in
> > >> > > > the
> > >> > > > > > > past)
> > >> > > > > > > > > > starting with our "next" API version. So instead of
> > >> APIv5,
> > >> > > we'd
> > >> > > > > > just
> > >> > > > > > > > jump
> > >> > > > > > > > > > to APIv7. ex:
> > >> > > > > > > > >
> > >> > > > > > > > > I strongly disagree with "synchronizing" the API and
> > >> project
> > >> > > > > version.
> > >> > > > > > > The
> > >> > > > > > > > > idea that they need to be the same is deeply confused
> > >> about
> > >> > > what
> > >> > > > > they
> > >> > > > > > > > are,
> > >> > > > > > > > > and making them the same will reinforce that confusion
> > >> with the
> > >> > > > > > people
> > >> > > > > > > > who
> > >> > > > > > > > > are confused.
> > >> > > > > > > > >
> > >> > > > > > > > > The project version and the API version are completely
> > >> > > > independent
> > >> > > > > > and
> > >> > > > > > > > > unrelated things. The idea that they need to be
> > versioned
> > >> > > > together
> > >> > > > > > and
> > >> > > > > > > > are
> > >> > > > > > > > > somehow the same thing is incredibly confused and
> > mistaken
> > >> > > about
> > >> > > > > the
> > >> > > > > > > > > fundamental idea of what an API is and what a code
> > >> project is.
> > >> > > > > > > > >
> > >> > > > > > > > > The API is the API. The project is the project. An API
> > is
> > >> an
> > >> > > > > > > Application
> > >> > > > > > > > > Programming Interface: an interface, like an electric
> > >> outlet
> > >> > > or a
> > >> > > > > > water
> > >> > > > > > > > > faucet connection. The Traffic Control project is a
> code
> > >> > > > project: a
> > >> > > > > > > > > collection of applications, written in code, to do a
> > >> thing, in
> > >> > > > this
> > >> > > > > > > case
> > >> > > > > > > > a
> > >> > > > > > > > > CDN.
> > >> > > > > > > > >
> > >> > > > > > > > > These are completely, entirely, totally different
> > things.
> > >> It
> > >> > > > would
> > >> > > > > be
> > >> > > > > > > > like
> > >> > > > > > > > > working for a company that sells both laptops and
> > >> capacitors,
> > >> > > and
> > >> > > > > > > saying,
> > >> > > > > > > > > "Our capacitors and laptops should have the same
> serial
> > >> > > numbers,
> > >> > > > > > > because
> > >> > > > > > > > > they both contain iron atoms."
> > >> > > > > > > > >
> > >> > > > > > > > > Yes, the code in the project serves certain APIs. But
> > the
> > >> two
> > >> > > > > things
> > >> > > > > > > are
> > >> > > > > > > > > completely independent. Giving them the same version
> > will
> > >> > > > reinforce
> > >> > > > > > the
> > >> > > > > > > > > wrong and confused belief that they're somehow the
> same
> > >> thing,
> > >> > > > when
> > >> > > > > > > > > literally the only thing they have in common as ideas
> is
> > >> that
> > >> > > > > they're
> > >> > > > > > > two
> > >> > > > > > > > > version numbers published by Apache Traffic Control.
> > >> > > > > > > > >
> > >> > > > > > > > > Moreover, All Traffic Control applications will always
> > >> have to
> > >> > > > > serve
> > >> > > > > > at
> > >> > > > > > > > > least one major version back, in order to make it
> > >> possible to
> > >> > > > > > upgrade.
> > >> > > > > > > So
> > >> > > > > > > > > the confused idea that they're somehow the same will
> be
> > >> made
> > >> > > even
> > >> > > > > > more
> > >> > > > > > > > > confusing, because now people think "The API is the
> same
> > >> as the
> > >> > > > > > > Project,
> > >> > > > > > > > > and the version proves it, but the project has to
> serve
> > >> > > multiple
> > >> > > > > > APIs."
> > >> > > > > > > > > Making people even more confused.
> > >> > > > > > > > >
> > >> > > > > > > > > In fact, I'm inclined to think making the versions
> > >> completely
> > >> > > > > > different
> > >> > > > > > > > > schemes, such as one being letters and the other
> > numbers,
> > >> would
> > >> > > > > help
> > >> > > > > > > > reduce
> > >> > > > > > > > > the confusion, and make it more clear that the two
> > >> versioned
> > >> > > > things
> > >> > > > > > are
> > >> > > > > > > > > completely unrelated.
> > >> > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > > > On Tue, Jul 20, 2021 at 1:00 PM Jeremy Mitchell <
> > >> > > > > > mitchell...@gmail.com
> > >> > > > > > > >
> > >> > > > > > > > > wrote:
> > >> > > > > > > > >
> > >> > > > > > > > > > ^^ I'm good with this.
> > >> > > > > > > > > >
> > >> > > > > > > > > > Also, after years of API confusion, is it time to
> > >> simply sync
> > >> > > > the
> > >> > > > > > ATC
> > >> > > > > > > > > > version with the API version (brennan has touched on
> > >> this in
> > >> > > > the
> > >> > > > > > > past)
> > >> > > > > > > > > > starting with our "next" API version. So instead of
> > >> APIv5,
> > >> > > we'd
> > >> > > > > > just
> > >> > > > > > > > jump
> > >> > > > > > > > > > to APIv7. ex:
> > >> > > > > > > > > >
> > >> > > > > > > > > > ATCv7 supports APIv7 (to get inline with ATC
> version)
> > >> and
> > >> > > APIv4
> > >> > > > > > (the
> > >> > > > > > > > api
> > >> > > > > > > > > > version from ATCv6)
> > >> > > > > > > > > > ATCv8 supports APIv8 and APIv7
> > >> > > > > > > > > > etc
> > >> > > > > > > > > >
> > >> > > > > > > > > > but then i guess that begs the question, if we bump
> > the
> > >> major
> > >> > > > ATC
> > >> > > > > > > > version
> > >> > > > > > > > > > for another reason (big feature or something), does
> > >> that mean
> > >> > > > we
> > >> > > > > > have
> > >> > > > > > > > to
> > >> > > > > > > > > > bump the API version if not really necessary just to
> > >> keep
> > >> > > ATCv
> > >> > > > ==
> > >> > > > > > > APIv?
> > >> > > > > > > > > >
> > >> > > > > > > > > > jeremy
> > >> > > > > > > > > >
> > >> > > > > > > > > > On Mon, Jul 19, 2021 at 1:08 PM Rawlin Peters <
> > >> > > > raw...@apache.org
> > >> > > > > >
> > >> > > > > > > > wrote:
> > >> > > > > > > > > >
> > >> > > > > > > > > > > > What kind of backward compatibility expectation
> > are
> > >> we
> > >> > > > aiming
> > >> > > > > > for
> > >> > > > > > > > > here?
> > >> > > > > > > > > > > With 1.x we were coming from 5+ years of backward
> > >> > > > compatibility
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > I don't think we ever intended for API 1.x to live
> > >> for so
> > >> > > > long,
> > >> > > > > > but
> > >> > > > > > > > we
> > >> > > > > > > > > > > also never promised an agreed-upon amount of time
> > for
> > >> > > > backwards
> > >> > > > > > > > > > > compatibility. I think the intention is that we'd
> > >> like to
> > >> > > > have
> > >> > > > > > one
> > >> > > > > > > > > > > major release cycle where both major API versions
> > are
> > >> > > > supported
> > >> > > > > > (in
> > >> > > > > > > > > > > order for clients to have a transitionary period),
> > >> then we
> > >> > > > are
> > >> > > > > > free
> > >> > > > > > > > to
> > >> > > > > > > > > > > remove the deprecated API version in the following
> > >> release.
> > >> > > > The
> > >> > > > > > > > amount
> > >> > > > > > > > > > > of time we remain backwards-compatible should
> really
> > >> depend
> > >> > > > on
> > >> > > > > > how
> > >> > > > > > > > > > > long the release cycles are, which we're aiming
> for
> > >> > > > quarterly.
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > I agree it is a lot of headache to update 3rd
> party
> > >> tooling
> > >> > > > as
> > >> > > > > > API
> > >> > > > > > > > > > > versions are deprecated and removed (which is why
> > I'm
> > >> > > hoping
> > >> > > > we
> > >> > > > > > > don't
> > >> > > > > > > > > > > introduce another major API version very soon),
> but
> > >> > > hopefully
> > >> > > > > the
> > >> > > > > > > > vast
> > >> > > > > > > > > > > majority of cases are simply updating the URLs
> from
> > >> 2.0 or
> > >> > > > 3.0
> > >> > > > > to
> > >> > > > > > > > 4.0,
> > >> > > > > > > > > > > since there should only be a small number of
> > >> breakages from
> > >> > > > 2.0
> > >> > > > > > to
> > >> > > > > > > > 4.0
> > >> > > > > > > > > > > (mostly servers-related routes) that would
> actually
> > >> require
> > >> > > > > > > changing
> > >> > > > > > > > > > > more than just the URL. Migrating from 1.x has
> > >> probably
> > >> > > been
> > >> > > > > more
> > >> > > > > > > > > > > difficult since we dropped a lot of redundant
> > routes.
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > - Rawlin
> > >> > > > > > > > > > >
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > - Rawlin
> > >> > > > > > > > > > >
> > >> > > > > > > > > > > On Mon, Jul 19, 2021 at 11:43 AM Gray, Jonathan
> > >> > > > > > > > > > > <jonathan_g...@comcast.com.invalid> wrote:
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > What kind of backward compatibility expectation
> > are
> > >> we
> > >> > > > aiming
> > >> > > > > > for
> > >> > > > > > > > > here?
> > >> > > > > > > > > > > With 1.x we were coming from 5+ years of backward
> > >> > > > compatibility
> > >> > > > > > and
> > >> > > > > > > > now
> > >> > > > > > > > > > it
> > >> > > > > > > > > > > seems like we’re aiming for < 1 year with rotation
> > at
> > >> every
> > >> > > > > major
> > >> > > > > > > > rev.
> > >> > > > > > > > > > > That’s a lot of headache for 3rd party tooling
> > >> support to
> > >> > > > > > > constantly
> > >> > > > > > > > be
> > >> > > > > > > > > > > changing regardless if that means you’re upgrading
> > SDK
> > >> > > > > > dependencies
> > >> > > > > > > > or
> > >> > > > > > > > > > raw
> > >> > > > > > > > > > > HTTP calls.
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > Jonathan G
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > From: Rawlin Peters <raw...@apache.org>
> > >> > > > > > > > > > > > Date: Friday, July 16, 2021 at 11:54 AM
> > >> > > > > > > > > > > > To: dev@trafficcontrol.apache.org <
> > >> > > > > > dev@trafficcontrol.apache.org
> > >> > > > > > > >
> > >> > > > > > > > > > > > Subject: [EXTERNAL] Re: Deprecate APIv2 and v3
> > >> > > > > > > > > > > > +1 on deprecating API v2-3 with the release of
> > >> ACTv6 and
> > >> > > > > > removing
> > >> > > > > > > > > them
> > >> > > > > > > > > > > > in ATCv7. Hopefully we won't need a TO API v5
> very
> > >> soon
> > >> > > so
> > >> > > > we
> > >> > > > > > can
> > >> > > > > > > > > have
> > >> > > > > > > > > > > > a break from the API instability.
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > +1 on not requiring every v2 and v3 endpoint to
> > >> return
> > >> > > > > > > deprecation
> > >> > > > > > > > > > > > notices. I think just mentioning it on the
> mailing
> > >> list,
> > >> > > > the
> > >> > > > > > > > > > > > changelog, and the docs should cover it.
> Updating
> > >> all the
> > >> > > > > v2/v3
> > >> > > > > > > > > > > > endpoints to return deprecation notices would be
> > >> quite a
> > >> > > > lot
> > >> > > > > of
> > >> > > > > > > > code
> > >> > > > > > > > > > > > change with very little benefit IMO. However,
> for
> > >> certain
> > >> > > > > > > endpoints
> > >> > > > > > > > > > > > that have no v4 equivalent, we are returning
> > >> deprecation
> > >> > > > > > notices
> > >> > > > > > > > > (e.g.
> > >> > > > > > > > > > > > cachegroup parameters).
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > - Rawlin
> > >> > > > > > > > > > > >
> > >> > > > > > > > > > > > On Fri, Jul 16, 2021 at 11:28 AM ocket 8888 <
> > >> > > > > > ocket8...@gmail.com
> > >> > > > > > > >
> > >> > > > > > > > > > wrote:
> > >> > > > > > > > > > > > >
> > >> > > > > > > > > > > > > With the release of APIv4 in ATCv6, should we
> > >> > > > > simultaneously
> > >> > > > > > > > > > deprecate
> > >> > > > > > > > > > > > > APIv2 and APIv3? I think so, that'll mean we
> can
> > >> remove
> > >> > > > > them
> > >> > > > > > in
> > >> > > > > > > > > > ATCv7,
> > >> > > > > > > > > > > > > whereupon the stable API 4.0 will have existed
> > >> for a
> > >> > > full
> > >> > > > > > major
> > >> > > > > > > > > rev,
> > >> > > > > > > > > > > and
> > >> > > > > > > > > > > > > APIv5 will ostensibly be released (if not
> > sooner,
> > >> since
> > >> > > > we
> > >> > > > > > > could
> > >> > > > > > > > do
> > >> > > > > > > > > > > that
> > >> > > > > > > > > > > > > e.g. in a 6.1).
> > >> > > > > > > > > > > > >
> > >> > > > > > > > > > > > > If so, we should also discuss what that will
> > mean
> > >> > > > > materially.
> > >> > > > > > > > With
> > >> > > > > > > > > > > > > endpoints that disappear between API versions
> we
> > >> have
> > >> > > > them
> > >> > > > > > > return
> > >> > > > > > > > > > > > > warning-level alerts that indicate they won't
> be
> > >> > > > available
> > >> > > > > on
> > >> > > > > > > > > > upgrade,
> > >> > > > > > > > > > > but
> > >> > > > > > > > > > > > > for APIv1 as a whole we didn't issue any kind
> of
> > >> formal
> > >> > > > > > notice
> > >> > > > > > > > > afaik,
> > >> > > > > > > > > > > not
> > >> > > > > > > > > > > > > even a changelog entry. I think the right
> answer
> > >> is
> > >> > > > > somewhere
> > >> > > > > > > > > between
> > >> > > > > > > > > > > these
> > >> > > > > > > > > > > > > - a changelog entry and notices on the APIv2
> and
> > >> APIv3
> > >> > > > > > > reference
> > >> > > > > > > > > > > sections
> > >> > > > > > > > > > > > > of the documentation. I don't think it's
> > >> necessary to
> > >> > > > > mention
> > >> > > > > > > on
> > >> > > > > > > > > each
> > >> > > > > > > > > > > > > endpoint that the entire API version is
> > >> deprecated,
> > >> > > > either
> > >> > > > > in
> > >> > > > > > > the
> > >> > > > > > > > > > > > > documentation or in the API through Alerts.
> > >> > > > > > > > > > >
> > >> > > > > > > > > >
> > >> > > > > > > > >
> > >> > > > > > > >
> > >> > > > > > >
> > >> > > > > >
> > >> > > > >
> > >> > > >
> > >> > >
> > >>
> > >
> >
>

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